Our Sales Team try Bitrix24 and wants to their email accouts ...@ourcompany.com be linked to CRM in Bitrix.

But we have few corporate restictions:- all emails from all accounts must have copies on domain's mail-server- Executives didn't want (and even are not allowed) to have emails on server other than domain's mail-server.

What is best solution for linking only Sales Team accounts at @ourcompany.com domain with Webmail in Bitrix ?